通过邮政和ASP.NET MVC的Amazon S3上传 [英] Amazon S3 Upload via Post and ASP.NET MVC

问题描述

我一直妄图2天，现在做一个简单的上传到我的Amazon S3的桶。下面是我的呈现形式：

 ＆LT;形式的行动=htt​​p://s3.amazonaws.com/MYBUCKETNAME方法=POSTENCTYPE =的multipart / form-data的＆GT;
    ＆LT;输入类型=隐藏的名字=AWSAccessKeyIdVALUE =MYACCESSKEY/＆GT;
    ＆LT;输入类型=隐藏的名字=ACLVALUE =私有/＆GT;
    ＆LT;输入类型=隐藏的名字=键值=UserUploads /为TestUser / $ {文件名}/＆GT;
    ＆LT;输入类型=隐藏的名字=success_action_redirectVALUE =htt​​p://WWW.MYURL.COM//＆GT;
    ＆LT;输入类型=隐藏的名字=政策VALUE =政策/＆GT;
    ＆LT;输入类型=隐藏的名字=签名值=签名/＆GT;
    ＆LT; D​​IV＆GT;
        请指定一个文件或一组文件：
        ＆LT;输入类型=文件名称=文件大小=100/＆GT;
    ＆LT; / DIV＆GT;
    ＆LT;输入类型=提交值=上传/＆GT;
    ＆LT; /表及GT;
 

和我的政策文件看起来是这样的：

  {
        期满=2011-12-08T12：00：00.000Z，
        条件= [
                [EQ，斗，MYBUCKETNAME]，
                [EQ，ACL，私人]
                [开始，以，$键，UserUploads /为TestUser /]，
                [EQ，success_action_redirect，HTTP://WWW.MYURL.COM/]
            ]
    }
 

我收到以下错误：
code：存取遭拒，
消息：策略条件失败：根据政策无效[EQ，斗，MYBUCKETNAME]

有没有人有请，我在这里救命稻草抓住任何想法。还不能肯定，如果我的桶政策和ACL是正确的。

解决方案

根据 http://doc.s3.amazonaws.com/proposals/post.html#Access_Control

  

匹配一个特定值

  
  

说明：有要符合特定领域
  特定的值，如匹配水桶名称或要求由
  对象是使用公共读访问控制策略上传。该
  字段的值是大小写敏感的，但是名字却不是。

  
  

语法：有要求的领域字段名匹配两种方式
  字符串值。该值是区分大小写的。如果该值开始
  以美元符号（$），美元符号必须使用转义
  反斜线（\\ $）

  [EQ，$字段名，S]，
 

（注意$ preFIX）。

所以，你的政策，你应该使用有$成套EQ的格式

I've been trying in vain for 2 days now to do a simple upload to my Amazon S3 Bucket. Below is my rendered form:

    <form action="http://s3.amazonaws.com/MYBUCKETNAME" method="post" enctype="multipart/form-data">
    <input type="hidden" name="AWSAccessKeyId" value="MYACCESSKEY" />
    <input type="hidden" name="acl" value="private" />
    <input type="hidden" name="key" value="UserUploads/TestUser/${filename}" />
    <input type="hidden" name="success_action_redirect" value="http://WWW.MYURL.COM/" />
    <input type="hidden" name="policy" value="POLICY" />
    <input type="hidden" name="signature" value="SIGNATURE" />
    <div>
        Please specify a file, or a set of files:
        <input type="file" name="file" size="100" />
    </div>
    <input type="submit" value="Upload" />
    </form>

and my policy document looks like this:

    {
        expiration = "2011-12-08T12:00:00.000Z",
        conditions = [
                ["eq","bucket","MYBUCKETNAME"],
                ["eq","acl","private"],
                ["starts-with","$key","UserUploads/TestUser/"],
                ["eq","success_action_redirect", "HTTP://WWW.MYURL.COM/"]
            ]
    }

I get the following error: Code: AccessDenied, Message: Invalid according to Policy: Policy Condition failed: ["eq", "bucket", "MYBUCKETNAME"]

Does anyone have any ideas please, I'm grabbing at straws here. Also not sure if my Bucket Policy and ACL is correct.

解决方案

According to http://doc.s3.amazonaws.com/proposals/post.html#Access_Control

Matching a Particular Value

Description: There are certain fields that you want to match a particular value, such as matching a bucket name or requiring that an object is uploaded using the public-read access control policy. The field value is case sensitive, but the name is not.

Syntax: There are two ways to require that the field fieldname matches the string value. The value is case sensitive. If the value starts with a dollar sign ($), the dollar sign must be escaped with a backslash (\$)

[ "eq", "$fieldname", "S" ],

(Note the $ prefix).

So your policy should have $ in sets where you using "eq" format

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